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2032 lines
83 KiB
Python
2032 lines
83 KiB
Python
import sys
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import pytest
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import numpy as np
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from numpy.testing import (
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assert_, assert_raises, assert_equal,
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assert_warns, assert_no_warnings, assert_array_equal,
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assert_array_almost_equal, suppress_warnings)
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from numpy.random import Generator, MT19937, SeedSequence
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random = Generator(MT19937())
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@pytest.fixture(scope='module', params=[True, False])
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def endpoint(request):
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return request.param
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class TestSeed(object):
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def test_scalar(self):
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s = Generator(MT19937(0))
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assert_equal(s.integers(1000), 479)
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s = Generator(MT19937(4294967295))
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assert_equal(s.integers(1000), 324)
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def test_array(self):
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s = Generator(MT19937(range(10)))
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assert_equal(s.integers(1000), 465)
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s = Generator(MT19937(np.arange(10)))
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assert_equal(s.integers(1000), 465)
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s = Generator(MT19937([0]))
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assert_equal(s.integers(1000), 479)
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s = Generator(MT19937([4294967295]))
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assert_equal(s.integers(1000), 324)
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def test_seedsequence(self):
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s = MT19937(SeedSequence(0))
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assert_equal(s.random_raw(1), 2058676884)
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def test_invalid_scalar(self):
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# seed must be an unsigned 32 bit integer
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assert_raises(TypeError, MT19937, -0.5)
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assert_raises(ValueError, MT19937, -1)
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def test_invalid_array(self):
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# seed must be an unsigned integer
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assert_raises(TypeError, MT19937, [-0.5])
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assert_raises(ValueError, MT19937, [-1])
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assert_raises(ValueError, MT19937, [1, -2, 4294967296])
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def test_noninstantized_bitgen(self):
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assert_raises(ValueError, Generator, MT19937)
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class TestBinomial(object):
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def test_n_zero(self):
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# Tests the corner case of n == 0 for the binomial distribution.
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# binomial(0, p) should be zero for any p in [0, 1].
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# This test addresses issue #3480.
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zeros = np.zeros(2, dtype='int')
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for p in [0, .5, 1]:
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assert_(random.binomial(0, p) == 0)
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assert_array_equal(random.binomial(zeros, p), zeros)
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def test_p_is_nan(self):
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# Issue #4571.
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assert_raises(ValueError, random.binomial, 1, np.nan)
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class TestMultinomial(object):
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def test_basic(self):
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random.multinomial(100, [0.2, 0.8])
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def test_zero_probability(self):
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random.multinomial(100, [0.2, 0.8, 0.0, 0.0, 0.0])
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def test_int_negative_interval(self):
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assert_(-5 <= random.integers(-5, -1) < -1)
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x = random.integers(-5, -1, 5)
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assert_(np.all(-5 <= x))
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assert_(np.all(x < -1))
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def test_size(self):
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# gh-3173
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p = [0.5, 0.5]
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assert_equal(random.multinomial(1, p, np.uint32(1)).shape, (1, 2))
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assert_equal(random.multinomial(1, p, np.uint32(1)).shape, (1, 2))
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assert_equal(random.multinomial(1, p, np.uint32(1)).shape, (1, 2))
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assert_equal(random.multinomial(1, p, [2, 2]).shape, (2, 2, 2))
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assert_equal(random.multinomial(1, p, (2, 2)).shape, (2, 2, 2))
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assert_equal(random.multinomial(1, p, np.array((2, 2))).shape,
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(2, 2, 2))
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assert_raises(TypeError, random.multinomial, 1, p,
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float(1))
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def test_invalid_prob(self):
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assert_raises(ValueError, random.multinomial, 100, [1.1, 0.2])
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assert_raises(ValueError, random.multinomial, 100, [-.1, 0.9])
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def test_invalid_n(self):
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assert_raises(ValueError, random.multinomial, -1, [0.8, 0.2])
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assert_raises(ValueError, random.multinomial, [-1] * 10, [0.8, 0.2])
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def test_p_non_contiguous(self):
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p = np.arange(15.)
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p /= np.sum(p[1::3])
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pvals = p[1::3]
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random = Generator(MT19937(1432985819))
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non_contig = random.multinomial(100, pvals=pvals)
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random = Generator(MT19937(1432985819))
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contig = random.multinomial(100, pvals=np.ascontiguousarray(pvals))
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assert_array_equal(non_contig, contig)
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class TestSetState(object):
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def setup(self):
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self.seed = 1234567890
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self.rg = Generator(MT19937(self.seed))
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self.bit_generator = self.rg.bit_generator
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self.state = self.bit_generator.state
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self.legacy_state = (self.state['bit_generator'],
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self.state['state']['key'],
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self.state['state']['pos'])
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def test_gaussian_reset(self):
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# Make sure the cached every-other-Gaussian is reset.
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old = self.rg.standard_normal(size=3)
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self.bit_generator.state = self.state
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new = self.rg.standard_normal(size=3)
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assert_(np.all(old == new))
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def test_gaussian_reset_in_media_res(self):
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# When the state is saved with a cached Gaussian, make sure the
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# cached Gaussian is restored.
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self.rg.standard_normal()
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state = self.bit_generator.state
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old = self.rg.standard_normal(size=3)
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self.bit_generator.state = state
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new = self.rg.standard_normal(size=3)
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assert_(np.all(old == new))
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def test_negative_binomial(self):
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# Ensure that the negative binomial results take floating point
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# arguments without truncation.
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self.rg.negative_binomial(0.5, 0.5)
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class TestIntegers(object):
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rfunc = random.integers
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# valid integer/boolean types
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itype = [bool, np.int8, np.uint8, np.int16, np.uint16,
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np.int32, np.uint32, np.int64, np.uint64]
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def test_unsupported_type(self, endpoint):
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assert_raises(TypeError, self.rfunc, 1, endpoint=endpoint, dtype=float)
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def test_bounds_checking(self, endpoint):
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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assert_raises(ValueError, self.rfunc, lbnd - 1, ubnd,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, lbnd, ubnd + 1,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, ubnd, lbnd,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, 1, 0, endpoint=endpoint,
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dtype=dt)
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assert_raises(ValueError, self.rfunc, [lbnd - 1], ubnd,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, [lbnd], [ubnd + 1],
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, [ubnd], [lbnd],
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, 1, [0],
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endpoint=endpoint, dtype=dt)
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def test_bounds_checking_array(self, endpoint):
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + (not endpoint)
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assert_raises(ValueError, self.rfunc, [lbnd - 1] * 2, [ubnd] * 2,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, [lbnd] * 2,
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[ubnd + 1] * 2, endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, ubnd, [lbnd] * 2,
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endpoint=endpoint, dtype=dt)
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assert_raises(ValueError, self.rfunc, [1] * 2, 0,
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endpoint=endpoint, dtype=dt)
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def test_rng_zero_and_extremes(self, endpoint):
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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is_open = not endpoint
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tgt = ubnd - 1
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assert_equal(self.rfunc(tgt, tgt + is_open, size=1000,
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endpoint=endpoint, dtype=dt), tgt)
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assert_equal(self.rfunc([tgt], tgt + is_open, size=1000,
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endpoint=endpoint, dtype=dt), tgt)
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tgt = lbnd
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assert_equal(self.rfunc(tgt, tgt + is_open, size=1000,
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endpoint=endpoint, dtype=dt), tgt)
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assert_equal(self.rfunc(tgt, [tgt + is_open], size=1000,
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endpoint=endpoint, dtype=dt), tgt)
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tgt = (lbnd + ubnd) // 2
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assert_equal(self.rfunc(tgt, tgt + is_open, size=1000,
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endpoint=endpoint, dtype=dt), tgt)
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assert_equal(self.rfunc([tgt], [tgt + is_open],
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size=1000, endpoint=endpoint, dtype=dt),
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tgt)
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def test_rng_zero_and_extremes_array(self, endpoint):
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size = 1000
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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tgt = ubnd - 1
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assert_equal(self.rfunc([tgt], [tgt + 1],
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size=size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, size=size, dtype=dt), tgt)
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tgt = lbnd
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assert_equal(self.rfunc([tgt], [tgt + 1],
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size=size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, size=size, dtype=dt), tgt)
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tgt = (lbnd + ubnd) // 2
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assert_equal(self.rfunc([tgt], [tgt + 1],
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size=size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, dtype=dt), tgt)
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assert_equal(self.rfunc(
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[tgt] * size, [tgt + 1] * size, size=size, dtype=dt), tgt)
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def test_full_range(self, endpoint):
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# Test for ticket #1690
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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try:
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self.rfunc(lbnd, ubnd, endpoint=endpoint, dtype=dt)
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except Exception as e:
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raise AssertionError("No error should have been raised, "
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"but one was with the following "
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"message:\n\n%s" % str(e))
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def test_full_range_array(self, endpoint):
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# Test for ticket #1690
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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try:
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self.rfunc([lbnd] * 2, [ubnd], endpoint=endpoint, dtype=dt)
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except Exception as e:
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raise AssertionError("No error should have been raised, "
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"but one was with the following "
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"message:\n\n%s" % str(e))
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def test_in_bounds_fuzz(self, endpoint):
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# Don't use fixed seed
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random = Generator(MT19937())
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for dt in self.itype[1:]:
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for ubnd in [4, 8, 16]:
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vals = self.rfunc(2, ubnd - endpoint, size=2 ** 16,
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endpoint=endpoint, dtype=dt)
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assert_(vals.max() < ubnd)
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assert_(vals.min() >= 2)
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vals = self.rfunc(0, 2 - endpoint, size=2 ** 16, endpoint=endpoint,
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dtype=bool)
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assert_(vals.max() < 2)
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assert_(vals.min() >= 0)
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def test_scalar_array_equiv(self, endpoint):
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for dt in self.itype:
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lbnd = 0 if dt is bool else np.iinfo(dt).min
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ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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size = 1000
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random = Generator(MT19937(1234))
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scalar = random.integers(lbnd, ubnd, size=size, endpoint=endpoint,
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dtype=dt)
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random = Generator(MT19937(1234))
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scalar_array = random.integers([lbnd], [ubnd], size=size,
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endpoint=endpoint, dtype=dt)
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random = Generator(MT19937(1234))
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array = random.integers([lbnd] * size, [ubnd] *
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size, size=size, endpoint=endpoint, dtype=dt)
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assert_array_equal(scalar, scalar_array)
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assert_array_equal(scalar, array)
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def test_repeatability(self, endpoint):
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import hashlib
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# We use a md5 hash of generated sequences of 1000 samples
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# in the range [0, 6) for all but bool, where the range
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# is [0, 2). Hashes are for little endian numbers.
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tgt = {'bool': 'b3300e66d2bb59e493d255d47c3a6cbe',
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'int16': '39624ead49ad67e37545744024d2648b',
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'int32': '5c4810373f979336c6c0c999996e47a1',
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'int64': 'ab126c15edff26f55c50d2b7e37391ac',
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'int8': 'd1746364b48a020dab9ef0568e6c0cd2',
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'uint16': '39624ead49ad67e37545744024d2648b',
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'uint32': '5c4810373f979336c6c0c999996e47a1',
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'uint64': 'ab126c15edff26f55c50d2b7e37391ac',
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'uint8': 'd1746364b48a020dab9ef0568e6c0cd2'}
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for dt in self.itype[1:]:
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random = Generator(MT19937(1234))
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# view as little endian for hash
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if sys.byteorder == 'little':
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val = random.integers(0, 6 - endpoint, size=1000, endpoint=endpoint,
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dtype=dt)
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else:
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val = random.integers(0, 6 - endpoint, size=1000, endpoint=endpoint,
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dtype=dt).byteswap()
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res = hashlib.md5(val.view(np.int8)).hexdigest()
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assert_(tgt[np.dtype(dt).name] == res)
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# bools do not depend on endianness
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random = Generator(MT19937(1234))
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val = random.integers(0, 2 - endpoint, size=1000, endpoint=endpoint,
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dtype=bool).view(np.int8)
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res = hashlib.md5(val).hexdigest()
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assert_(tgt[np.dtype(bool).name] == res)
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def test_repeatability_broadcasting(self, endpoint):
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for dt in self.itype:
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lbnd = 0 if dt in (np.bool, bool, np.bool_) else np.iinfo(dt).min
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ubnd = 2 if dt in (
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np.bool, bool, np.bool_) else np.iinfo(dt).max + 1
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ubnd = ubnd - 1 if endpoint else ubnd
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# view as little endian for hash
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random = Generator(MT19937(1234))
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val = random.integers(lbnd, ubnd, size=1000, endpoint=endpoint,
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dtype=dt)
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random = Generator(MT19937(1234))
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val_bc = random.integers([lbnd] * 1000, ubnd, endpoint=endpoint,
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dtype=dt)
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assert_array_equal(val, val_bc)
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random = Generator(MT19937(1234))
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val_bc = random.integers([lbnd] * 1000, [ubnd] * 1000,
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endpoint=endpoint, dtype=dt)
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assert_array_equal(val, val_bc)
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def test_int64_uint64_broadcast_exceptions(self, endpoint):
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configs = {np.uint64: ((0, 2**65), (-1, 2**62), (10, 9), (0, 0)),
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np.int64: ((0, 2**64), (-(2**64), 2**62), (10, 9), (0, 0),
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(-2**63-1, -2**63-1))}
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for dtype in configs:
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for config in configs[dtype]:
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low, high = config
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high = high - endpoint
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low_a = np.array([[low]*10])
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high_a = np.array([high] * 10)
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assert_raises(ValueError, random.integers, low, high,
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endpoint=endpoint, dtype=dtype)
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assert_raises(ValueError, random.integers, low_a, high,
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endpoint=endpoint, dtype=dtype)
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assert_raises(ValueError, random.integers, low, high_a,
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endpoint=endpoint, dtype=dtype)
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assert_raises(ValueError, random.integers, low_a, high_a,
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endpoint=endpoint, dtype=dtype)
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low_o = np.array([[low]*10], dtype=np.object)
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high_o = np.array([high] * 10, dtype=np.object)
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assert_raises(ValueError, random.integers, low_o, high,
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endpoint=endpoint, dtype=dtype)
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assert_raises(ValueError, random.integers, low, high_o,
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endpoint=endpoint, dtype=dtype)
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assert_raises(ValueError, random.integers, low_o, high_o,
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endpoint=endpoint, dtype=dtype)
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def test_int64_uint64_corner_case(self, endpoint):
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# When stored in Numpy arrays, `lbnd` is casted
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# as np.int64, and `ubnd` is casted as np.uint64.
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# Checking whether `lbnd` >= `ubnd` used to be
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# done solely via direct comparison, which is incorrect
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# because when Numpy tries to compare both numbers,
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# it casts both to np.float64 because there is
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# no integer superset of np.int64 and np.uint64. However,
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# `ubnd` is too large to be represented in np.float64,
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# causing it be round down to np.iinfo(np.int64).max,
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# leading to a ValueError because `lbnd` now equals
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# the new `ubnd`.
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dt = np.int64
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tgt = np.iinfo(np.int64).max
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lbnd = np.int64(np.iinfo(np.int64).max)
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ubnd = np.uint64(np.iinfo(np.int64).max + 1 - endpoint)
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# None of these function calls should
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# generate a ValueError now.
|
|
actual = random.integers(lbnd, ubnd, endpoint=endpoint, dtype=dt)
|
|
assert_equal(actual, tgt)
|
|
|
|
def test_respect_dtype_singleton(self, endpoint):
|
|
# See gh-7203
|
|
for dt in self.itype:
|
|
lbnd = 0 if dt is bool else np.iinfo(dt).min
|
|
ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
|
|
ubnd = ubnd - 1 if endpoint else ubnd
|
|
dt = np.bool_ if dt is bool else dt
|
|
|
|
sample = self.rfunc(lbnd, ubnd, endpoint=endpoint, dtype=dt)
|
|
assert_equal(sample.dtype, dt)
|
|
|
|
for dt in (bool, int, np.long):
|
|
lbnd = 0 if dt is bool else np.iinfo(dt).min
|
|
ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
|
|
ubnd = ubnd - 1 if endpoint else ubnd
|
|
|
|
# gh-7284: Ensure that we get Python data types
|
|
sample = self.rfunc(lbnd, ubnd, endpoint=endpoint, dtype=dt)
|
|
assert not hasattr(sample, 'dtype')
|
|
assert_equal(type(sample), dt)
|
|
|
|
def test_respect_dtype_array(self, endpoint):
|
|
# See gh-7203
|
|
for dt in self.itype:
|
|
lbnd = 0 if dt is bool else np.iinfo(dt).min
|
|
ubnd = 2 if dt is bool else np.iinfo(dt).max + 1
|
|
ubnd = ubnd - 1 if endpoint else ubnd
|
|
dt = np.bool_ if dt is bool else dt
|
|
|
|
sample = self.rfunc([lbnd], [ubnd], endpoint=endpoint, dtype=dt)
|
|
assert_equal(sample.dtype, dt)
|
|
sample = self.rfunc([lbnd] * 2, [ubnd] * 2, endpoint=endpoint,
|
|
dtype=dt)
|
|
assert_equal(sample.dtype, dt)
|
|
|
|
def test_zero_size(self, endpoint):
|
|
# See gh-7203
|
|
for dt in self.itype:
|
|
sample = self.rfunc(0, 0, (3, 0, 4), endpoint=endpoint, dtype=dt)
|
|
assert sample.shape == (3, 0, 4)
|
|
assert sample.dtype == dt
|
|
assert self.rfunc(0, -10, 0, endpoint=endpoint,
|
|
dtype=dt).shape == (0,)
|
|
assert_equal(random.integers(0, 0, size=(3, 0, 4)).shape,
|
|
(3, 0, 4))
|
|
assert_equal(random.integers(0, -10, size=0).shape, (0,))
|
|
assert_equal(random.integers(10, 10, size=0).shape, (0,))
|
|
|
|
def test_error_byteorder(self):
|
|
other_byteord_dt = '<i4' if sys.byteorder == 'big' else '>i4'
|
|
with pytest.raises(ValueError):
|
|
random.integers(0, 200, size=10, dtype=other_byteord_dt)
|
|
|
|
|
|
class TestRandomDist(object):
|
|
# Make sure the random distribution returns the correct value for a
|
|
# given seed
|
|
|
|
def setup(self):
|
|
self.seed = 1234567890
|
|
|
|
def test_integers(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.integers(-99, 99, size=(3, 2))
|
|
desired = np.array([[-80, -56], [41, 37], [-83, -16]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_integers_masked(self):
|
|
# Test masked rejection sampling algorithm to generate array of
|
|
# uint32 in an interval.
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.integers(0, 99, size=(3, 2), dtype=np.uint32)
|
|
desired = np.array([[9, 21], [70, 68], [8, 41]], dtype=np.uint32)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_integers_closed(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.integers(-99, 99, size=(3, 2), endpoint=True)
|
|
desired = np.array([[-80, -56], [ 41, 38], [-83, -15]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_integers_max_int(self):
|
|
# Tests whether integers with closed=True can generate the
|
|
# maximum allowed Python int that can be converted
|
|
# into a C long. Previous implementations of this
|
|
# method have thrown an OverflowError when attempting
|
|
# to generate this integer.
|
|
actual = random.integers(np.iinfo('l').max, np.iinfo('l').max,
|
|
endpoint=True)
|
|
|
|
desired = np.iinfo('l').max
|
|
assert_equal(actual, desired)
|
|
|
|
def test_random(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.random((3, 2))
|
|
desired = np.array([[0.096999199829214, 0.707517457682192],
|
|
[0.084364834598269, 0.767731206553125],
|
|
[0.665069021359413, 0.715487190596693]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.random()
|
|
assert_array_almost_equal(actual, desired[0, 0], decimal=15)
|
|
|
|
def test_random_float(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.random((3, 2))
|
|
desired = np.array([[0.0969992 , 0.70751746],
|
|
[0.08436483, 0.76773121],
|
|
[0.66506902, 0.71548719]])
|
|
assert_array_almost_equal(actual, desired, decimal=7)
|
|
|
|
def test_random_float_scalar(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.random(dtype=np.float32)
|
|
desired = 0.0969992
|
|
assert_array_almost_equal(actual, desired, decimal=7)
|
|
|
|
def test_random_unsupported_type(self):
|
|
assert_raises(TypeError, random.random, dtype='int32')
|
|
|
|
def test_choice_uniform_replace(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(4, 4)
|
|
desired = np.array([0, 0, 2, 2], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_nonuniform_replace(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(4, 4, p=[0.4, 0.4, 0.1, 0.1])
|
|
desired = np.array([0, 1, 0, 1], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_uniform_noreplace(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(4, 3, replace=False)
|
|
desired = np.array([2, 0, 3], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
actual = random.choice(4, 4, replace=False, shuffle=False)
|
|
desired = np.arange(4, dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_nonuniform_noreplace(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(4, 3, replace=False, p=[0.1, 0.3, 0.5, 0.1])
|
|
desired = np.array([0, 2, 3], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_noninteger(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(['a', 'b', 'c', 'd'], 4)
|
|
desired = np.array(['a', 'a', 'c', 'c'])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_multidimensional_default_axis(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice([[0, 1], [2, 3], [4, 5], [6, 7]], 3)
|
|
desired = np.array([[0, 1], [0, 1], [4, 5]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_multidimensional_custom_axis(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice([[0, 1], [2, 3], [4, 5], [6, 7]], 1, axis=1)
|
|
desired = np.array([[0], [2], [4], [6]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_choice_exceptions(self):
|
|
sample = random.choice
|
|
assert_raises(ValueError, sample, -1, 3)
|
|
assert_raises(ValueError, sample, 3., 3)
|
|
assert_raises(ValueError, sample, [], 3)
|
|
assert_raises(ValueError, sample, [1, 2, 3, 4], 3,
|
|
p=[[0.25, 0.25], [0.25, 0.25]])
|
|
assert_raises(ValueError, sample, [1, 2], 3, p=[0.4, 0.4, 0.2])
|
|
assert_raises(ValueError, sample, [1, 2], 3, p=[1.1, -0.1])
|
|
assert_raises(ValueError, sample, [1, 2], 3, p=[0.4, 0.4])
|
|
assert_raises(ValueError, sample, [1, 2, 3], 4, replace=False)
|
|
# gh-13087
|
|
assert_raises(ValueError, sample, [1, 2, 3], -2, replace=False)
|
|
assert_raises(ValueError, sample, [1, 2, 3], (-1,), replace=False)
|
|
assert_raises(ValueError, sample, [1, 2, 3], (-1, 1), replace=False)
|
|
assert_raises(ValueError, sample, [1, 2, 3], 2,
|
|
replace=False, p=[1, 0, 0])
|
|
|
|
def test_choice_return_shape(self):
|
|
p = [0.1, 0.9]
|
|
# Check scalar
|
|
assert_(np.isscalar(random.choice(2, replace=True)))
|
|
assert_(np.isscalar(random.choice(2, replace=False)))
|
|
assert_(np.isscalar(random.choice(2, replace=True, p=p)))
|
|
assert_(np.isscalar(random.choice(2, replace=False, p=p)))
|
|
assert_(np.isscalar(random.choice([1, 2], replace=True)))
|
|
assert_(random.choice([None], replace=True) is None)
|
|
a = np.array([1, 2])
|
|
arr = np.empty(1, dtype=object)
|
|
arr[0] = a
|
|
assert_(random.choice(arr, replace=True) is a)
|
|
|
|
# Check 0-d array
|
|
s = tuple()
|
|
assert_(not np.isscalar(random.choice(2, s, replace=True)))
|
|
assert_(not np.isscalar(random.choice(2, s, replace=False)))
|
|
assert_(not np.isscalar(random.choice(2, s, replace=True, p=p)))
|
|
assert_(not np.isscalar(random.choice(2, s, replace=False, p=p)))
|
|
assert_(not np.isscalar(random.choice([1, 2], s, replace=True)))
|
|
assert_(random.choice([None], s, replace=True).ndim == 0)
|
|
a = np.array([1, 2])
|
|
arr = np.empty(1, dtype=object)
|
|
arr[0] = a
|
|
assert_(random.choice(arr, s, replace=True).item() is a)
|
|
|
|
# Check multi dimensional array
|
|
s = (2, 3)
|
|
p = [0.1, 0.1, 0.1, 0.1, 0.4, 0.2]
|
|
assert_equal(random.choice(6, s, replace=True).shape, s)
|
|
assert_equal(random.choice(6, s, replace=False).shape, s)
|
|
assert_equal(random.choice(6, s, replace=True, p=p).shape, s)
|
|
assert_equal(random.choice(6, s, replace=False, p=p).shape, s)
|
|
assert_equal(random.choice(np.arange(6), s, replace=True).shape, s)
|
|
|
|
# Check zero-size
|
|
assert_equal(random.integers(0, 0, size=(3, 0, 4)).shape, (3, 0, 4))
|
|
assert_equal(random.integers(0, -10, size=0).shape, (0,))
|
|
assert_equal(random.integers(10, 10, size=0).shape, (0,))
|
|
assert_equal(random.choice(0, size=0).shape, (0,))
|
|
assert_equal(random.choice([], size=(0,)).shape, (0,))
|
|
assert_equal(random.choice(['a', 'b'], size=(3, 0, 4)).shape,
|
|
(3, 0, 4))
|
|
assert_raises(ValueError, random.choice, [], 10)
|
|
|
|
def test_choice_nan_probabilities(self):
|
|
a = np.array([42, 1, 2])
|
|
p = [None, None, None]
|
|
assert_raises(ValueError, random.choice, a, p=p)
|
|
|
|
def test_choice_p_non_contiguous(self):
|
|
p = np.ones(10) / 5
|
|
p[1::2] = 3.0
|
|
random = Generator(MT19937(self.seed))
|
|
non_contig = random.choice(5, 3, p=p[::2])
|
|
random = Generator(MT19937(self.seed))
|
|
contig = random.choice(5, 3, p=np.ascontiguousarray(p[::2]))
|
|
assert_array_equal(non_contig, contig)
|
|
|
|
def test_choice_return_type(self):
|
|
# gh 9867
|
|
p = np.ones(4) / 4.
|
|
actual = random.choice(4, 2)
|
|
assert actual.dtype == np.int64
|
|
actual = random.choice(4, 2, replace=False)
|
|
assert actual.dtype == np.int64
|
|
actual = random.choice(4, 2, p=p)
|
|
assert actual.dtype == np.int64
|
|
actual = random.choice(4, 2, p=p, replace=False)
|
|
assert actual.dtype == np.int64
|
|
|
|
def test_choice_large_sample(self):
|
|
import hashlib
|
|
|
|
choice_hash = 'd44962a0b1e92f4a3373c23222244e21'
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.choice(10000, 5000, replace=False)
|
|
if sys.byteorder != 'little':
|
|
actual = actual.byteswap()
|
|
res = hashlib.md5(actual.view(np.int8)).hexdigest()
|
|
assert_(choice_hash == res)
|
|
|
|
def test_bytes(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.bytes(10)
|
|
desired = b'\x86\xf0\xd4\x18\xe1\x81\t8%\xdd'
|
|
assert_equal(actual, desired)
|
|
|
|
def test_shuffle(self):
|
|
# Test lists, arrays (of various dtypes), and multidimensional versions
|
|
# of both, c-contiguous or not:
|
|
for conv in [lambda x: np.array([]),
|
|
lambda x: x,
|
|
lambda x: np.asarray(x).astype(np.int8),
|
|
lambda x: np.asarray(x).astype(np.float32),
|
|
lambda x: np.asarray(x).astype(np.complex64),
|
|
lambda x: np.asarray(x).astype(object),
|
|
lambda x: [(i, i) for i in x],
|
|
lambda x: np.asarray([[i, i] for i in x]),
|
|
lambda x: np.vstack([x, x]).T,
|
|
# gh-11442
|
|
lambda x: (np.asarray([(i, i) for i in x],
|
|
[("a", int), ("b", int)])
|
|
.view(np.recarray)),
|
|
# gh-4270
|
|
lambda x: np.asarray([(i, i) for i in x],
|
|
[("a", object, (1,)),
|
|
("b", np.int32, (1,))])]:
|
|
random = Generator(MT19937(self.seed))
|
|
alist = conv([1, 2, 3, 4, 5, 6, 7, 8, 9, 0])
|
|
random.shuffle(alist)
|
|
actual = alist
|
|
desired = conv([4, 1, 9, 8, 0, 5, 3, 6, 2, 7])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_shuffle_masked(self):
|
|
# gh-3263
|
|
a = np.ma.masked_values(np.reshape(range(20), (5, 4)) % 3 - 1, -1)
|
|
b = np.ma.masked_values(np.arange(20) % 3 - 1, -1)
|
|
a_orig = a.copy()
|
|
b_orig = b.copy()
|
|
for i in range(50):
|
|
random.shuffle(a)
|
|
assert_equal(
|
|
sorted(a.data[~a.mask]), sorted(a_orig.data[~a_orig.mask]))
|
|
random.shuffle(b)
|
|
assert_equal(
|
|
sorted(b.data[~b.mask]), sorted(b_orig.data[~b_orig.mask]))
|
|
|
|
def test_permutation(self):
|
|
random = Generator(MT19937(self.seed))
|
|
alist = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
|
|
actual = random.permutation(alist)
|
|
desired = [4, 1, 9, 8, 0, 5, 3, 6, 2, 7]
|
|
assert_array_equal(actual, desired)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
arr_2d = np.atleast_2d([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]).T
|
|
actual = random.permutation(arr_2d)
|
|
assert_array_equal(actual, np.atleast_2d(desired).T)
|
|
|
|
bad_x_str = "abcd"
|
|
assert_raises(np.AxisError, random.permutation, bad_x_str)
|
|
|
|
bad_x_float = 1.2
|
|
assert_raises(np.AxisError, random.permutation, bad_x_float)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
integer_val = 10
|
|
desired = [3, 0, 8, 7, 9, 4, 2, 5, 1, 6]
|
|
|
|
actual = random.permutation(integer_val)
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_beta(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.beta(.1, .9, size=(3, 2))
|
|
desired = np.array(
|
|
[[1.083029353267698e-10, 2.449965303168024e-11],
|
|
[2.397085162969853e-02, 3.590779671820755e-08],
|
|
[2.830254190078299e-04, 1.744709918330393e-01]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_binomial(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.binomial(100.123, .456, size=(3, 2))
|
|
desired = np.array([[42, 41],
|
|
[42, 48],
|
|
[44, 50]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.binomial(100.123, .456)
|
|
desired = 42
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_chisquare(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.chisquare(50, size=(3, 2))
|
|
desired = np.array([[32.9850547060149, 39.0219480493301],
|
|
[56.2006134779419, 57.3474165711485],
|
|
[55.4243733880198, 55.4209797925213]])
|
|
assert_array_almost_equal(actual, desired, decimal=13)
|
|
|
|
def test_dirichlet(self):
|
|
random = Generator(MT19937(self.seed))
|
|
alpha = np.array([51.72840233779265162, 39.74494232180943953])
|
|
actual = random.dirichlet(alpha, size=(3, 2))
|
|
desired = np.array([[[0.5439892869558927, 0.45601071304410745],
|
|
[0.5588917345860708, 0.4411082654139292 ]],
|
|
[[0.5632074165063435, 0.43679258349365657],
|
|
[0.54862581112627, 0.45137418887373015]],
|
|
[[0.49961831357047226, 0.5003816864295278 ],
|
|
[0.52374806183482, 0.47625193816517997]]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
bad_alpha = np.array([5.4e-01, -1.0e-16])
|
|
assert_raises(ValueError, random.dirichlet, bad_alpha)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
alpha = np.array([51.72840233779265162, 39.74494232180943953])
|
|
actual = random.dirichlet(alpha)
|
|
assert_array_almost_equal(actual, desired[0, 0], decimal=15)
|
|
|
|
def test_dirichlet_size(self):
|
|
# gh-3173
|
|
p = np.array([51.72840233779265162, 39.74494232180943953])
|
|
assert_equal(random.dirichlet(p, np.uint32(1)).shape, (1, 2))
|
|
assert_equal(random.dirichlet(p, np.uint32(1)).shape, (1, 2))
|
|
assert_equal(random.dirichlet(p, np.uint32(1)).shape, (1, 2))
|
|
assert_equal(random.dirichlet(p, [2, 2]).shape, (2, 2, 2))
|
|
assert_equal(random.dirichlet(p, (2, 2)).shape, (2, 2, 2))
|
|
assert_equal(random.dirichlet(p, np.array((2, 2))).shape, (2, 2, 2))
|
|
|
|
assert_raises(TypeError, random.dirichlet, p, float(1))
|
|
|
|
def test_dirichlet_bad_alpha(self):
|
|
# gh-2089
|
|
alpha = np.array([5.4e-01, -1.0e-16])
|
|
assert_raises(ValueError, random.dirichlet, alpha)
|
|
|
|
def test_dirichlet_alpha_non_contiguous(self):
|
|
a = np.array([51.72840233779265162, -1.0, 39.74494232180943953])
|
|
alpha = a[::2]
|
|
random = Generator(MT19937(self.seed))
|
|
non_contig = random.dirichlet(alpha, size=(3, 2))
|
|
random = Generator(MT19937(self.seed))
|
|
contig = random.dirichlet(np.ascontiguousarray(alpha),
|
|
size=(3, 2))
|
|
assert_array_almost_equal(non_contig, contig)
|
|
|
|
def test_exponential(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.exponential(1.1234, size=(3, 2))
|
|
desired = np.array([[0.098845481066258, 1.560752510746964],
|
|
[0.075730916041636, 1.769098974710777],
|
|
[1.488602544592235, 2.49684815275751 ]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_exponential_0(self):
|
|
assert_equal(random.exponential(scale=0), 0)
|
|
assert_raises(ValueError, random.exponential, scale=-0.)
|
|
|
|
def test_f(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.f(12, 77, size=(3, 2))
|
|
desired = np.array([[0.461720027077085, 1.100441958872451],
|
|
[1.100337455217484, 0.91421736740018 ],
|
|
[0.500811891303113, 0.826802454552058]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_gamma(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.gamma(5, 3, size=(3, 2))
|
|
desired = np.array([[ 5.03850858902096, 7.9228656732049 ],
|
|
[18.73983605132985, 19.57961681699238],
|
|
[18.17897755150825, 18.17653912505234]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_gamma_0(self):
|
|
assert_equal(random.gamma(shape=0, scale=0), 0)
|
|
assert_raises(ValueError, random.gamma, shape=-0., scale=-0.)
|
|
|
|
def test_geometric(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.geometric(.123456789, size=(3, 2))
|
|
desired = np.array([[ 1, 10],
|
|
[ 1, 12],
|
|
[ 9, 10]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_geometric_exceptions(self):
|
|
assert_raises(ValueError, random.geometric, 1.1)
|
|
assert_raises(ValueError, random.geometric, [1.1] * 10)
|
|
assert_raises(ValueError, random.geometric, -0.1)
|
|
assert_raises(ValueError, random.geometric, [-0.1] * 10)
|
|
with np.errstate(invalid='ignore'):
|
|
assert_raises(ValueError, random.geometric, np.nan)
|
|
assert_raises(ValueError, random.geometric, [np.nan] * 10)
|
|
|
|
def test_gumbel(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.gumbel(loc=.123456789, scale=2.0, size=(3, 2))
|
|
desired = np.array([[ 4.688397515056245, -0.289514845417841],
|
|
[ 4.981176042584683, -0.633224272589149],
|
|
[-0.055915275687488, -0.333962478257953]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_gumbel_0(self):
|
|
assert_equal(random.gumbel(scale=0), 0)
|
|
assert_raises(ValueError, random.gumbel, scale=-0.)
|
|
|
|
def test_hypergeometric(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.hypergeometric(10.1, 5.5, 14, size=(3, 2))
|
|
desired = np.array([[ 9, 9],
|
|
[ 9, 9],
|
|
[10, 9]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
# Test nbad = 0
|
|
actual = random.hypergeometric(5, 0, 3, size=4)
|
|
desired = np.array([3, 3, 3, 3])
|
|
assert_array_equal(actual, desired)
|
|
|
|
actual = random.hypergeometric(15, 0, 12, size=4)
|
|
desired = np.array([12, 12, 12, 12])
|
|
assert_array_equal(actual, desired)
|
|
|
|
# Test ngood = 0
|
|
actual = random.hypergeometric(0, 5, 3, size=4)
|
|
desired = np.array([0, 0, 0, 0])
|
|
assert_array_equal(actual, desired)
|
|
|
|
actual = random.hypergeometric(0, 15, 12, size=4)
|
|
desired = np.array([0, 0, 0, 0])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_laplace(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.laplace(loc=.123456789, scale=2.0, size=(3, 2))
|
|
desired = np.array([[-3.156353949272393, 1.195863024830054],
|
|
[-3.435458081645966, 1.656882398925444],
|
|
[ 0.924824032467446, 1.251116432209336]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_laplace_0(self):
|
|
assert_equal(random.laplace(scale=0), 0)
|
|
assert_raises(ValueError, random.laplace, scale=-0.)
|
|
|
|
def test_logistic(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.logistic(loc=.123456789, scale=2.0, size=(3, 2))
|
|
desired = np.array([[-4.338584631510999, 1.890171436749954],
|
|
[-4.64547787337966 , 2.514545562919217],
|
|
[ 1.495389489198666, 1.967827627577474]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_lognormal(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.lognormal(mean=.123456789, sigma=2.0, size=(3, 2))
|
|
desired = np.array([[ 0.0268252166335, 13.9534486483053],
|
|
[ 0.1204014788936, 2.2422077497792],
|
|
[ 4.2484199496128, 12.0093343977523]])
|
|
assert_array_almost_equal(actual, desired, decimal=13)
|
|
|
|
def test_lognormal_0(self):
|
|
assert_equal(random.lognormal(sigma=0), 1)
|
|
assert_raises(ValueError, random.lognormal, sigma=-0.)
|
|
|
|
def test_logseries(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.logseries(p=.923456789, size=(3, 2))
|
|
desired = np.array([[14, 17],
|
|
[3, 18],
|
|
[5, 1]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_logseries_exceptions(self):
|
|
with np.errstate(invalid='ignore'):
|
|
assert_raises(ValueError, random.logseries, np.nan)
|
|
assert_raises(ValueError, random.logseries, [np.nan] * 10)
|
|
|
|
def test_multinomial(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.multinomial(20, [1 / 6.] * 6, size=(3, 2))
|
|
desired = np.array([[[1, 5, 1, 6, 4, 3],
|
|
[4, 2, 6, 2, 4, 2]],
|
|
[[5, 3, 2, 6, 3, 1],
|
|
[4, 4, 0, 2, 3, 7]],
|
|
[[6, 3, 1, 5, 3, 2],
|
|
[5, 5, 3, 1, 2, 4]]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_multivariate_normal(self):
|
|
random = Generator(MT19937(self.seed))
|
|
mean = (.123456789, 10)
|
|
cov = [[1, 0], [0, 1]]
|
|
size = (3, 2)
|
|
actual = random.multivariate_normal(mean, cov, size)
|
|
desired = np.array([[[-1.747478062846581, 11.25613495182354 ],
|
|
[-0.9967333370066214, 10.342002097029821 ]],
|
|
[[ 0.7850019631242964, 11.181113712443013 ],
|
|
[ 0.8901349653255224, 8.873825399642492 ]],
|
|
[[ 0.7130260107430003, 9.551628690083056 ],
|
|
[ 0.7127098726541128, 11.991709234143173 ]]])
|
|
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
# Check for default size, was raising deprecation warning
|
|
actual = random.multivariate_normal(mean, cov)
|
|
desired = np.array([0.233278563284287, 9.424140804347195])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
# Check that non positive-semidefinite covariance warns with
|
|
# RuntimeWarning
|
|
mean = [0, 0]
|
|
cov = [[1, 2], [2, 1]]
|
|
assert_warns(RuntimeWarning, random.multivariate_normal, mean, cov)
|
|
|
|
# and that it doesn't warn with RuntimeWarning check_valid='ignore'
|
|
assert_no_warnings(random.multivariate_normal, mean, cov,
|
|
check_valid='ignore')
|
|
|
|
# and that it raises with RuntimeWarning check_valid='raises'
|
|
assert_raises(ValueError, random.multivariate_normal, mean, cov,
|
|
check_valid='raise')
|
|
|
|
cov = np.array([[1, 0.1], [0.1, 1]], dtype=np.float32)
|
|
with suppress_warnings() as sup:
|
|
random.multivariate_normal(mean, cov)
|
|
w = sup.record(RuntimeWarning)
|
|
assert len(w) == 0
|
|
|
|
mu = np.zeros(2)
|
|
cov = np.eye(2)
|
|
assert_raises(ValueError, random.multivariate_normal, mean, cov,
|
|
check_valid='other')
|
|
assert_raises(ValueError, random.multivariate_normal,
|
|
np.zeros((2, 1, 1)), cov)
|
|
assert_raises(ValueError, random.multivariate_normal,
|
|
mu, np.empty((3, 2)))
|
|
assert_raises(ValueError, random.multivariate_normal,
|
|
mu, np.eye(3))
|
|
|
|
def test_negative_binomial(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.negative_binomial(n=100, p=.12345, size=(3, 2))
|
|
desired = np.array([[543, 727],
|
|
[775, 760],
|
|
[600, 674]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_negative_binomial_exceptions(self):
|
|
with np.errstate(invalid='ignore'):
|
|
assert_raises(ValueError, random.negative_binomial, 100, np.nan)
|
|
assert_raises(ValueError, random.negative_binomial, 100,
|
|
[np.nan] * 10)
|
|
|
|
def test_noncentral_chisquare(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.noncentral_chisquare(df=5, nonc=5, size=(3, 2))
|
|
desired = np.array([[ 1.70561552362133, 15.97378184942111],
|
|
[13.71483425173724, 20.17859633310629],
|
|
[11.3615477156643 , 3.67891108738029]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
actual = random.noncentral_chisquare(df=.5, nonc=.2, size=(3, 2))
|
|
desired = np.array([[9.41427665607629e-04, 1.70473157518850e-04],
|
|
[1.14554372041263e+00, 1.38187755933435e-03],
|
|
[1.90659181905387e+00, 1.21772577941822e+00]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.noncentral_chisquare(df=5, nonc=0, size=(3, 2))
|
|
desired = np.array([[0.82947954590419, 1.80139670767078],
|
|
[6.58720057417794, 7.00491463609814],
|
|
[6.31101879073157, 6.30982307753005]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_noncentral_f(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.noncentral_f(dfnum=5, dfden=2, nonc=1,
|
|
size=(3, 2))
|
|
desired = np.array([[0.060310671139 , 0.23866058175939],
|
|
[0.86860246709073, 0.2668510459738 ],
|
|
[0.23375780078364, 1.88922102885943]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_noncentral_f_nan(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.noncentral_f(dfnum=5, dfden=2, nonc=np.nan)
|
|
assert np.isnan(actual)
|
|
|
|
def test_normal(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.normal(loc=.123456789, scale=2.0, size=(3, 2))
|
|
desired = np.array([[-3.618412914693162, 2.635726692647081],
|
|
[-2.116923463013243, 0.807460983059643],
|
|
[ 1.446547137248593, 2.485684213886024]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_normal_0(self):
|
|
assert_equal(random.normal(scale=0), 0)
|
|
assert_raises(ValueError, random.normal, scale=-0.)
|
|
|
|
def test_pareto(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.pareto(a=.123456789, size=(3, 2))
|
|
desired = np.array([[1.0394926776069018e+00, 7.7142534343505773e+04],
|
|
[7.2640150889064703e-01, 3.4650454783825594e+05],
|
|
[4.5852344481994740e+04, 6.5851383009539105e+07]])
|
|
# For some reason on 32-bit x86 Ubuntu 12.10 the [1, 0] entry in this
|
|
# matrix differs by 24 nulps. Discussion:
|
|
# https://mail.python.org/pipermail/numpy-discussion/2012-September/063801.html
|
|
# Consensus is that this is probably some gcc quirk that affects
|
|
# rounding but not in any important way, so we just use a looser
|
|
# tolerance on this test:
|
|
np.testing.assert_array_almost_equal_nulp(actual, desired, nulp=30)
|
|
|
|
def test_poisson(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.poisson(lam=.123456789, size=(3, 2))
|
|
desired = np.array([[0, 0],
|
|
[0, 0],
|
|
[0, 0]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
def test_poisson_exceptions(self):
|
|
lambig = np.iinfo('int64').max
|
|
lamneg = -1
|
|
assert_raises(ValueError, random.poisson, lamneg)
|
|
assert_raises(ValueError, random.poisson, [lamneg] * 10)
|
|
assert_raises(ValueError, random.poisson, lambig)
|
|
assert_raises(ValueError, random.poisson, [lambig] * 10)
|
|
with np.errstate(invalid='ignore'):
|
|
assert_raises(ValueError, random.poisson, np.nan)
|
|
assert_raises(ValueError, random.poisson, [np.nan] * 10)
|
|
|
|
def test_power(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.power(a=.123456789, size=(3, 2))
|
|
desired = np.array([[1.977857368842754e-09, 9.806792196620341e-02],
|
|
[2.482442984543471e-10, 1.527108843266079e-01],
|
|
[8.188283434244285e-02, 3.950547209346948e-01]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_rayleigh(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.rayleigh(scale=10, size=(3, 2))
|
|
desired = np.array([[ 4.51734079831581, 15.6802442485758 ],
|
|
[ 4.19850651287094, 17.08718809823704],
|
|
[14.7907457708776 , 15.85545333419775]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_rayleigh_0(self):
|
|
assert_equal(random.rayleigh(scale=0), 0)
|
|
assert_raises(ValueError, random.rayleigh, scale=-0.)
|
|
|
|
def test_standard_cauchy(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_cauchy(size=(3, 2))
|
|
desired = np.array([[-1.489437778266206, -3.275389641569784],
|
|
[ 0.560102864910406, -0.680780916282552],
|
|
[-1.314912905226277, 0.295852965660225]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_standard_exponential(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_exponential(size=(3, 2), method='inv')
|
|
desired = np.array([[0.102031839440643, 1.229350298474972],
|
|
[0.088137284693098, 1.459859985522667],
|
|
[1.093830802293668, 1.256977002164613]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_standard_expoential_type_error(self):
|
|
assert_raises(TypeError, random.standard_exponential, dtype=np.int32)
|
|
|
|
def test_standard_gamma(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_gamma(shape=3, size=(3, 2))
|
|
desired = np.array([[0.62970724056362, 1.22379851271008],
|
|
[3.899412530884 , 4.12479964250139],
|
|
[3.74994102464584, 3.74929307690815]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_standard_gammma_scalar_float(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_gamma(3, dtype=np.float32)
|
|
desired = 2.9242148399353027
|
|
assert_array_almost_equal(actual, desired, decimal=6)
|
|
|
|
def test_standard_gamma_float(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_gamma(shape=3, size=(3, 2))
|
|
desired = np.array([[0.62971, 1.2238 ],
|
|
[3.89941, 4.1248 ],
|
|
[3.74994, 3.74929]])
|
|
assert_array_almost_equal(actual, desired, decimal=5)
|
|
|
|
def test_standard_gammma_float_out(self):
|
|
actual = np.zeros((3, 2), dtype=np.float32)
|
|
random = Generator(MT19937(self.seed))
|
|
random.standard_gamma(10.0, out=actual, dtype=np.float32)
|
|
desired = np.array([[10.14987, 7.87012],
|
|
[ 9.46284, 12.56832],
|
|
[13.82495, 7.81533]], dtype=np.float32)
|
|
assert_array_almost_equal(actual, desired, decimal=5)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
random.standard_gamma(10.0, out=actual, size=(3, 2), dtype=np.float32)
|
|
assert_array_almost_equal(actual, desired, decimal=5)
|
|
|
|
def test_standard_gamma_unknown_type(self):
|
|
assert_raises(TypeError, random.standard_gamma, 1.,
|
|
dtype='int32')
|
|
|
|
def test_out_size_mismatch(self):
|
|
out = np.zeros(10)
|
|
assert_raises(ValueError, random.standard_gamma, 10.0, size=20,
|
|
out=out)
|
|
assert_raises(ValueError, random.standard_gamma, 10.0, size=(10, 1),
|
|
out=out)
|
|
|
|
def test_standard_gamma_0(self):
|
|
assert_equal(random.standard_gamma(shape=0), 0)
|
|
assert_raises(ValueError, random.standard_gamma, shape=-0.)
|
|
|
|
def test_standard_normal(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_normal(size=(3, 2))
|
|
desired = np.array([[-1.870934851846581, 1.25613495182354 ],
|
|
[-1.120190126006621, 0.342002097029821],
|
|
[ 0.661545174124296, 1.181113712443012]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_standard_normal_unsupported_type(self):
|
|
assert_raises(TypeError, random.standard_normal, dtype=np.int32)
|
|
|
|
def test_standard_t(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_t(df=10, size=(3, 2))
|
|
desired = np.array([[-1.484666193042647, 0.30597891831161 ],
|
|
[ 1.056684299648085, -0.407312602088507],
|
|
[ 0.130704414281157, -2.038053410490321]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_triangular(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.triangular(left=5.12, mode=10.23, right=20.34,
|
|
size=(3, 2))
|
|
desired = np.array([[ 7.86664070590917, 13.6313848513185 ],
|
|
[ 7.68152445215983, 14.36169131136546],
|
|
[13.16105603911429, 13.72341621856971]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_uniform(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.uniform(low=1.23, high=10.54, size=(3, 2))
|
|
desired = np.array([[2.13306255040998 , 7.816987531021207],
|
|
[2.015436610109887, 8.377577533009589],
|
|
[7.421792588856135, 7.891185744455209]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_uniform_range_bounds(self):
|
|
fmin = np.finfo('float').min
|
|
fmax = np.finfo('float').max
|
|
|
|
func = random.uniform
|
|
assert_raises(OverflowError, func, -np.inf, 0)
|
|
assert_raises(OverflowError, func, 0, np.inf)
|
|
assert_raises(OverflowError, func, fmin, fmax)
|
|
assert_raises(OverflowError, func, [-np.inf], [0])
|
|
assert_raises(OverflowError, func, [0], [np.inf])
|
|
|
|
# (fmax / 1e17) - fmin is within range, so this should not throw
|
|
# account for i386 extended precision DBL_MAX / 1e17 + DBL_MAX >
|
|
# DBL_MAX by increasing fmin a bit
|
|
random.uniform(low=np.nextafter(fmin, 1), high=fmax / 1e17)
|
|
|
|
def test_scalar_exception_propagation(self):
|
|
# Tests that exceptions are correctly propagated in distributions
|
|
# when called with objects that throw exceptions when converted to
|
|
# scalars.
|
|
#
|
|
# Regression test for gh: 8865
|
|
|
|
class ThrowingFloat(np.ndarray):
|
|
def __float__(self):
|
|
raise TypeError
|
|
|
|
throwing_float = np.array(1.0).view(ThrowingFloat)
|
|
assert_raises(TypeError, random.uniform, throwing_float,
|
|
throwing_float)
|
|
|
|
class ThrowingInteger(np.ndarray):
|
|
def __int__(self):
|
|
raise TypeError
|
|
|
|
throwing_int = np.array(1).view(ThrowingInteger)
|
|
assert_raises(TypeError, random.hypergeometric, throwing_int, 1, 1)
|
|
|
|
def test_vonmises(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.vonmises(mu=1.23, kappa=1.54, size=(3, 2))
|
|
desired = np.array([[ 1.107972248690106, 2.841536476232361],
|
|
[ 1.832602376042457, 1.945511926976032],
|
|
[-0.260147475776542, 2.058047492231698]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_vonmises_small(self):
|
|
# check infinite loop, gh-4720
|
|
random = Generator(MT19937(self.seed))
|
|
r = random.vonmises(mu=0., kappa=1.1e-8, size=10**6)
|
|
assert_(np.isfinite(r).all())
|
|
|
|
def test_vonmises_nan(self):
|
|
random = Generator(MT19937(self.seed))
|
|
r = random.vonmises(mu=0., kappa=np.nan)
|
|
assert_(np.isnan(r))
|
|
|
|
def test_wald(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.wald(mean=1.23, scale=1.54, size=(3, 2))
|
|
desired = np.array([[0.26871721804551, 3.2233942732115 ],
|
|
[2.20328374987066, 2.40958405189353],
|
|
[2.07093587449261, 0.73073890064369]])
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_weibull(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.weibull(a=1.23, size=(3, 2))
|
|
desired = np.array([[0.138613914769468, 1.306463419753191],
|
|
[0.111623365934763, 1.446570494646721],
|
|
[1.257145775276011, 1.914247725027957]])
|
|
assert_array_almost_equal(actual, desired, decimal=15)
|
|
|
|
def test_weibull_0(self):
|
|
random = Generator(MT19937(self.seed))
|
|
assert_equal(random.weibull(a=0, size=12), np.zeros(12))
|
|
assert_raises(ValueError, random.weibull, a=-0.)
|
|
|
|
def test_zipf(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.zipf(a=1.23, size=(3, 2))
|
|
desired = np.array([[ 1, 1],
|
|
[ 10, 867],
|
|
[354, 2]])
|
|
assert_array_equal(actual, desired)
|
|
|
|
|
|
class TestBroadcast(object):
|
|
# tests that functions that broadcast behave
|
|
# correctly when presented with non-scalar arguments
|
|
def setup(self):
|
|
self.seed = 123456789
|
|
|
|
|
|
def test_uniform(self):
|
|
random = Generator(MT19937(self.seed))
|
|
low = [0]
|
|
high = [1]
|
|
uniform = random.uniform
|
|
desired = np.array([0.16693771389729, 0.19635129550675, 0.75563050964095])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.uniform(low * 3, high)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.uniform(low, high * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_normal(self):
|
|
loc = [0]
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
random = Generator(MT19937(self.seed))
|
|
desired = np.array([-0.38736406738527, 0.79594375042255, 0.0197076236097])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.normal(loc * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.normal, loc * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
normal = random.normal
|
|
actual = normal(loc, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, normal, loc, bad_scale * 3)
|
|
|
|
def test_beta(self):
|
|
a = [1]
|
|
b = [2]
|
|
bad_a = [-1]
|
|
bad_b = [-2]
|
|
desired = np.array([0.18719338682602, 0.73234824491364, 0.17928615186455])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
beta = random.beta
|
|
actual = beta(a * 3, b)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, beta, bad_a * 3, b)
|
|
assert_raises(ValueError, beta, a * 3, bad_b)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.beta(a, b * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_exponential(self):
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
desired = np.array([0.67245993212806, 0.21380495318094, 0.7177848928629])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.exponential(scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.exponential, bad_scale * 3)
|
|
|
|
def test_standard_gamma(self):
|
|
shape = [1]
|
|
bad_shape = [-1]
|
|
desired = np.array([0.67245993212806, 0.21380495318094, 0.7177848928629])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
std_gamma = random.standard_gamma
|
|
actual = std_gamma(shape * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, std_gamma, bad_shape * 3)
|
|
|
|
def test_gamma(self):
|
|
shape = [1]
|
|
scale = [2]
|
|
bad_shape = [-1]
|
|
bad_scale = [-2]
|
|
desired = np.array([1.34491986425611, 0.42760990636187, 1.4355697857258])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
gamma = random.gamma
|
|
actual = gamma(shape * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, gamma, bad_shape * 3, scale)
|
|
assert_raises(ValueError, gamma, shape * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
gamma = random.gamma
|
|
actual = gamma(shape, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, gamma, bad_shape, scale * 3)
|
|
assert_raises(ValueError, gamma, shape, bad_scale * 3)
|
|
|
|
def test_f(self):
|
|
dfnum = [1]
|
|
dfden = [2]
|
|
bad_dfnum = [-1]
|
|
bad_dfden = [-2]
|
|
desired = np.array([0.07765056244107, 7.72951397913186, 0.05786093891763])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
f = random.f
|
|
actual = f(dfnum * 3, dfden)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, f, bad_dfnum * 3, dfden)
|
|
assert_raises(ValueError, f, dfnum * 3, bad_dfden)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
f = random.f
|
|
actual = f(dfnum, dfden * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, f, bad_dfnum, dfden * 3)
|
|
assert_raises(ValueError, f, dfnum, bad_dfden * 3)
|
|
|
|
def test_noncentral_f(self):
|
|
dfnum = [2]
|
|
dfden = [3]
|
|
nonc = [4]
|
|
bad_dfnum = [0]
|
|
bad_dfden = [-1]
|
|
bad_nonc = [-2]
|
|
desired = np.array([2.02434240411421, 12.91838601070124, 1.24395160354629])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
nonc_f = random.noncentral_f
|
|
actual = nonc_f(dfnum * 3, dfden, nonc)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert np.all(np.isnan(nonc_f(dfnum, dfden, [np.nan] * 3)))
|
|
|
|
assert_raises(ValueError, nonc_f, bad_dfnum * 3, dfden, nonc)
|
|
assert_raises(ValueError, nonc_f, dfnum * 3, bad_dfden, nonc)
|
|
assert_raises(ValueError, nonc_f, dfnum * 3, dfden, bad_nonc)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
nonc_f = random.noncentral_f
|
|
actual = nonc_f(dfnum, dfden * 3, nonc)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, nonc_f, bad_dfnum, dfden * 3, nonc)
|
|
assert_raises(ValueError, nonc_f, dfnum, bad_dfden * 3, nonc)
|
|
assert_raises(ValueError, nonc_f, dfnum, dfden * 3, bad_nonc)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
nonc_f = random.noncentral_f
|
|
actual = nonc_f(dfnum, dfden, nonc * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, nonc_f, bad_dfnum, dfden, nonc * 3)
|
|
assert_raises(ValueError, nonc_f, dfnum, bad_dfden, nonc * 3)
|
|
assert_raises(ValueError, nonc_f, dfnum, dfden, bad_nonc * 3)
|
|
|
|
def test_noncentral_f_small_df(self):
|
|
random = Generator(MT19937(self.seed))
|
|
desired = np.array([0.04714867120827, 0.1239390327694])
|
|
actual = random.noncentral_f(0.9, 0.9, 2, size=2)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
|
|
def test_chisquare(self):
|
|
df = [1]
|
|
bad_df = [-1]
|
|
desired = np.array([0.05573640064251, 1.47220224353539, 2.9469379318589])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.chisquare(df * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.chisquare, bad_df * 3)
|
|
|
|
def test_noncentral_chisquare(self):
|
|
df = [1]
|
|
nonc = [2]
|
|
bad_df = [-1]
|
|
bad_nonc = [-2]
|
|
desired = np.array([0.07710766249436, 5.27829115110304, 0.630732147399])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
nonc_chi = random.noncentral_chisquare
|
|
actual = nonc_chi(df * 3, nonc)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, nonc_chi, bad_df * 3, nonc)
|
|
assert_raises(ValueError, nonc_chi, df * 3, bad_nonc)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
nonc_chi = random.noncentral_chisquare
|
|
actual = nonc_chi(df, nonc * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, nonc_chi, bad_df, nonc * 3)
|
|
assert_raises(ValueError, nonc_chi, df, bad_nonc * 3)
|
|
|
|
def test_standard_t(self):
|
|
df = [1]
|
|
bad_df = [-1]
|
|
desired = np.array([-1.39498829447098, -1.23058658835223, 0.17207021065983])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.standard_t(df * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.standard_t, bad_df * 3)
|
|
|
|
def test_vonmises(self):
|
|
mu = [2]
|
|
kappa = [1]
|
|
bad_kappa = [-1]
|
|
desired = np.array([2.25935584988528, 2.23326261461399, -2.84152146503326])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.vonmises(mu * 3, kappa)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.vonmises, mu * 3, bad_kappa)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.vonmises(mu, kappa * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.vonmises, mu, bad_kappa * 3)
|
|
|
|
def test_pareto(self):
|
|
a = [1]
|
|
bad_a = [-1]
|
|
desired = np.array([0.95905052946317, 0.2383810889437 , 1.04988745750013])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.pareto(a * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.pareto, bad_a * 3)
|
|
|
|
def test_weibull(self):
|
|
a = [1]
|
|
bad_a = [-1]
|
|
desired = np.array([0.67245993212806, 0.21380495318094, 0.7177848928629])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.weibull(a * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.weibull, bad_a * 3)
|
|
|
|
def test_power(self):
|
|
a = [1]
|
|
bad_a = [-1]
|
|
desired = np.array([0.48954864361052, 0.19249412888486, 0.51216834058807])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.power(a * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.power, bad_a * 3)
|
|
|
|
def test_laplace(self):
|
|
loc = [0]
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
desired = np.array([-1.09698732625119, -0.93470271947368, 0.71592671378202])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
laplace = random.laplace
|
|
actual = laplace(loc * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, laplace, loc * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
laplace = random.laplace
|
|
actual = laplace(loc, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, laplace, loc, bad_scale * 3)
|
|
|
|
def test_gumbel(self):
|
|
loc = [0]
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
desired = np.array([1.70020068231762, 1.52054354273631, -0.34293267607081])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
gumbel = random.gumbel
|
|
actual = gumbel(loc * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, gumbel, loc * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
gumbel = random.gumbel
|
|
actual = gumbel(loc, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, gumbel, loc, bad_scale * 3)
|
|
|
|
def test_logistic(self):
|
|
loc = [0]
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
desired = np.array([-1.607487640433, -1.40925686003678, 1.12887112820397])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.logistic(loc * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.logistic, loc * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.logistic(loc, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.logistic, loc, bad_scale * 3)
|
|
assert_equal(random.logistic(1.0, 0.0), 1.0)
|
|
|
|
def test_lognormal(self):
|
|
mean = [0]
|
|
sigma = [1]
|
|
bad_sigma = [-1]
|
|
desired = np.array([0.67884390500697, 2.21653186290321, 1.01990310084276])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
lognormal = random.lognormal
|
|
actual = lognormal(mean * 3, sigma)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, lognormal, mean * 3, bad_sigma)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.lognormal(mean, sigma * 3)
|
|
assert_raises(ValueError, random.lognormal, mean, bad_sigma * 3)
|
|
|
|
def test_rayleigh(self):
|
|
scale = [1]
|
|
bad_scale = [-1]
|
|
desired = np.array([0.60439534475066, 0.66120048396359, 1.67873398389499])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.rayleigh(scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.rayleigh, bad_scale * 3)
|
|
|
|
def test_wald(self):
|
|
mean = [0.5]
|
|
scale = [1]
|
|
bad_mean = [0]
|
|
bad_scale = [-2]
|
|
desired = np.array([0.38052407392905, 0.50701641508592, 0.484935249864])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.wald(mean * 3, scale)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.wald, bad_mean * 3, scale)
|
|
assert_raises(ValueError, random.wald, mean * 3, bad_scale)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.wald(mean, scale * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, random.wald, bad_mean, scale * 3)
|
|
assert_raises(ValueError, random.wald, mean, bad_scale * 3)
|
|
|
|
def test_triangular(self):
|
|
left = [1]
|
|
right = [3]
|
|
mode = [2]
|
|
bad_left_one = [3]
|
|
bad_mode_one = [4]
|
|
bad_left_two, bad_mode_two = right * 2
|
|
desired = np.array([1.57781954604754, 1.62665986867957, 2.30090130831326])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
triangular = random.triangular
|
|
actual = triangular(left * 3, mode, right)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, triangular, bad_left_one * 3, mode, right)
|
|
assert_raises(ValueError, triangular, left * 3, bad_mode_one, right)
|
|
assert_raises(ValueError, triangular, bad_left_two * 3, bad_mode_two,
|
|
right)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
triangular = random.triangular
|
|
actual = triangular(left, mode * 3, right)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, triangular, bad_left_one, mode * 3, right)
|
|
assert_raises(ValueError, triangular, left, bad_mode_one * 3, right)
|
|
assert_raises(ValueError, triangular, bad_left_two, bad_mode_two * 3,
|
|
right)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
triangular = random.triangular
|
|
actual = triangular(left, mode, right * 3)
|
|
assert_array_almost_equal(actual, desired, decimal=14)
|
|
assert_raises(ValueError, triangular, bad_left_one, mode, right * 3)
|
|
assert_raises(ValueError, triangular, left, bad_mode_one, right * 3)
|
|
assert_raises(ValueError, triangular, bad_left_two, bad_mode_two,
|
|
right * 3)
|
|
|
|
assert_raises(ValueError, triangular, 10., 0., 20.)
|
|
assert_raises(ValueError, triangular, 10., 25., 20.)
|
|
assert_raises(ValueError, triangular, 10., 10., 10.)
|
|
|
|
def test_binomial(self):
|
|
n = [1]
|
|
p = [0.5]
|
|
bad_n = [-1]
|
|
bad_p_one = [-1]
|
|
bad_p_two = [1.5]
|
|
desired = np.array([0, 0, 1])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
binom = random.binomial
|
|
actual = binom(n * 3, p)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, binom, bad_n * 3, p)
|
|
assert_raises(ValueError, binom, n * 3, bad_p_one)
|
|
assert_raises(ValueError, binom, n * 3, bad_p_two)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.binomial(n, p * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, binom, bad_n, p * 3)
|
|
assert_raises(ValueError, binom, n, bad_p_one * 3)
|
|
assert_raises(ValueError, binom, n, bad_p_two * 3)
|
|
|
|
def test_negative_binomial(self):
|
|
n = [1]
|
|
p = [0.5]
|
|
bad_n = [-1]
|
|
bad_p_one = [-1]
|
|
bad_p_two = [1.5]
|
|
desired = np.array([0, 2, 1], dtype=np.int64)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
neg_binom = random.negative_binomial
|
|
actual = neg_binom(n * 3, p)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, neg_binom, bad_n * 3, p)
|
|
assert_raises(ValueError, neg_binom, n * 3, bad_p_one)
|
|
assert_raises(ValueError, neg_binom, n * 3, bad_p_two)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
neg_binom = random.negative_binomial
|
|
actual = neg_binom(n, p * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, neg_binom, bad_n, p * 3)
|
|
assert_raises(ValueError, neg_binom, n, bad_p_one * 3)
|
|
assert_raises(ValueError, neg_binom, n, bad_p_two * 3)
|
|
|
|
def test_poisson(self):
|
|
|
|
lam = [1]
|
|
bad_lam_one = [-1]
|
|
desired = np.array([0, 0, 3])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
max_lam = random._poisson_lam_max
|
|
bad_lam_two = [max_lam * 2]
|
|
poisson = random.poisson
|
|
actual = poisson(lam * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, poisson, bad_lam_one * 3)
|
|
assert_raises(ValueError, poisson, bad_lam_two * 3)
|
|
|
|
def test_zipf(self):
|
|
a = [2]
|
|
bad_a = [0]
|
|
desired = np.array([1, 8, 1])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
zipf = random.zipf
|
|
actual = zipf(a * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, zipf, bad_a * 3)
|
|
with np.errstate(invalid='ignore'):
|
|
assert_raises(ValueError, zipf, np.nan)
|
|
assert_raises(ValueError, zipf, [0, 0, np.nan])
|
|
|
|
def test_geometric(self):
|
|
p = [0.5]
|
|
bad_p_one = [-1]
|
|
bad_p_two = [1.5]
|
|
desired = np.array([1, 1, 3])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
geometric = random.geometric
|
|
actual = geometric(p * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, geometric, bad_p_one * 3)
|
|
assert_raises(ValueError, geometric, bad_p_two * 3)
|
|
|
|
def test_hypergeometric(self):
|
|
ngood = [1]
|
|
nbad = [2]
|
|
nsample = [2]
|
|
bad_ngood = [-1]
|
|
bad_nbad = [-2]
|
|
bad_nsample_one = [-1]
|
|
bad_nsample_two = [4]
|
|
desired = np.array([0, 0, 1])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.hypergeometric(ngood * 3, nbad, nsample)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, random.hypergeometric, bad_ngood * 3, nbad, nsample)
|
|
assert_raises(ValueError, random.hypergeometric, ngood * 3, bad_nbad, nsample)
|
|
assert_raises(ValueError, random.hypergeometric, ngood * 3, nbad, bad_nsample_one)
|
|
assert_raises(ValueError, random.hypergeometric, ngood * 3, nbad, bad_nsample_two)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.hypergeometric(ngood, nbad * 3, nsample)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, random.hypergeometric, bad_ngood, nbad * 3, nsample)
|
|
assert_raises(ValueError, random.hypergeometric, ngood, bad_nbad * 3, nsample)
|
|
assert_raises(ValueError, random.hypergeometric, ngood, nbad * 3, bad_nsample_one)
|
|
assert_raises(ValueError, random.hypergeometric, ngood, nbad * 3, bad_nsample_two)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
hypergeom = random.hypergeometric
|
|
actual = hypergeom(ngood, nbad, nsample * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, hypergeom, bad_ngood, nbad, nsample * 3)
|
|
assert_raises(ValueError, hypergeom, ngood, bad_nbad, nsample * 3)
|
|
assert_raises(ValueError, hypergeom, ngood, nbad, bad_nsample_one * 3)
|
|
assert_raises(ValueError, hypergeom, ngood, nbad, bad_nsample_two * 3)
|
|
|
|
assert_raises(ValueError, hypergeom, -1, 10, 20)
|
|
assert_raises(ValueError, hypergeom, 10, -1, 20)
|
|
assert_raises(ValueError, hypergeom, 10, 10, -1)
|
|
assert_raises(ValueError, hypergeom, 10, 10, 25)
|
|
|
|
# ValueError for arguments that are too big.
|
|
assert_raises(ValueError, hypergeom, 2**30, 10, 20)
|
|
assert_raises(ValueError, hypergeom, 999, 2**31, 50)
|
|
assert_raises(ValueError, hypergeom, 999, [2**29, 2**30], 1000)
|
|
|
|
def test_logseries(self):
|
|
p = [0.5]
|
|
bad_p_one = [2]
|
|
bad_p_two = [-1]
|
|
desired = np.array([1, 1, 1])
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
logseries = random.logseries
|
|
actual = logseries(p * 3)
|
|
assert_array_equal(actual, desired)
|
|
assert_raises(ValueError, logseries, bad_p_one * 3)
|
|
assert_raises(ValueError, logseries, bad_p_two * 3)
|
|
|
|
def test_multinomial(self):
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.multinomial([5, 20], [1 / 6.] * 6, size=(3, 2))
|
|
desired = np.array([[[0, 0, 2, 1, 2, 0],
|
|
[2, 3, 6, 4, 2, 3]],
|
|
[[1, 0, 1, 0, 2, 1],
|
|
[7, 2, 2, 1, 4, 4]],
|
|
[[0, 2, 0, 1, 2, 0],
|
|
[3, 2, 3, 3, 4, 5]]], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
random = Generator(MT19937(self.seed))
|
|
actual = random.multinomial([5, 20], [1 / 6.] * 6)
|
|
desired = np.array([[0, 0, 2, 1, 2, 0],
|
|
[2, 3, 6, 4, 2, 3]], dtype=np.int64)
|
|
assert_array_equal(actual, desired)
|
|
|
|
|
|
class TestThread(object):
|
|
# make sure each state produces the same sequence even in threads
|
|
def setup(self):
|
|
self.seeds = range(4)
|
|
|
|
def check_function(self, function, sz):
|
|
from threading import Thread
|
|
|
|
out1 = np.empty((len(self.seeds),) + sz)
|
|
out2 = np.empty((len(self.seeds),) + sz)
|
|
|
|
# threaded generation
|
|
t = [Thread(target=function, args=(Generator(MT19937(s)), o))
|
|
for s, o in zip(self.seeds, out1)]
|
|
[x.start() for x in t]
|
|
[x.join() for x in t]
|
|
|
|
# the same serial
|
|
for s, o in zip(self.seeds, out2):
|
|
function(Generator(MT19937(s)), o)
|
|
|
|
# these platforms change x87 fpu precision mode in threads
|
|
if np.intp().dtype.itemsize == 4 and sys.platform == "win32":
|
|
assert_array_almost_equal(out1, out2)
|
|
else:
|
|
assert_array_equal(out1, out2)
|
|
|
|
def test_normal(self):
|
|
def gen_random(state, out):
|
|
out[...] = state.normal(size=10000)
|
|
|
|
self.check_function(gen_random, sz=(10000,))
|
|
|
|
def test_exp(self):
|
|
def gen_random(state, out):
|
|
out[...] = state.exponential(scale=np.ones((100, 1000)))
|
|
|
|
self.check_function(gen_random, sz=(100, 1000))
|
|
|
|
def test_multinomial(self):
|
|
def gen_random(state, out):
|
|
out[...] = state.multinomial(10, [1 / 6.] * 6, size=10000)
|
|
|
|
self.check_function(gen_random, sz=(10000, 6))
|
|
|
|
|
|
# See Issue #4263
|
|
class TestSingleEltArrayInput(object):
|
|
def setup(self):
|
|
self.argOne = np.array([2])
|
|
self.argTwo = np.array([3])
|
|
self.argThree = np.array([4])
|
|
self.tgtShape = (1,)
|
|
|
|
def test_one_arg_funcs(self):
|
|
funcs = (random.exponential, random.standard_gamma,
|
|
random.chisquare, random.standard_t,
|
|
random.pareto, random.weibull,
|
|
random.power, random.rayleigh,
|
|
random.poisson, random.zipf,
|
|
random.geometric, random.logseries)
|
|
|
|
probfuncs = (random.geometric, random.logseries)
|
|
|
|
for func in funcs:
|
|
if func in probfuncs: # p < 1.0
|
|
out = func(np.array([0.5]))
|
|
|
|
else:
|
|
out = func(self.argOne)
|
|
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
def test_two_arg_funcs(self):
|
|
funcs = (random.uniform, random.normal,
|
|
random.beta, random.gamma,
|
|
random.f, random.noncentral_chisquare,
|
|
random.vonmises, random.laplace,
|
|
random.gumbel, random.logistic,
|
|
random.lognormal, random.wald,
|
|
random.binomial, random.negative_binomial)
|
|
|
|
probfuncs = (random.binomial, random.negative_binomial)
|
|
|
|
for func in funcs:
|
|
if func in probfuncs: # p <= 1
|
|
argTwo = np.array([0.5])
|
|
|
|
else:
|
|
argTwo = self.argTwo
|
|
|
|
out = func(self.argOne, argTwo)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(self.argOne[0], argTwo)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(self.argOne, argTwo[0])
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
def test_integers(self, endpoint):
|
|
itype = [np.bool, np.int8, np.uint8, np.int16, np.uint16,
|
|
np.int32, np.uint32, np.int64, np.uint64]
|
|
func = random.integers
|
|
high = np.array([1])
|
|
low = np.array([0])
|
|
|
|
for dt in itype:
|
|
out = func(low, high, endpoint=endpoint, dtype=dt)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(low[0], high, endpoint=endpoint, dtype=dt)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(low, high[0], endpoint=endpoint, dtype=dt)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
def test_three_arg_funcs(self):
|
|
funcs = [random.noncentral_f, random.triangular,
|
|
random.hypergeometric]
|
|
|
|
for func in funcs:
|
|
out = func(self.argOne, self.argTwo, self.argThree)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(self.argOne[0], self.argTwo, self.argThree)
|
|
assert_equal(out.shape, self.tgtShape)
|
|
|
|
out = func(self.argOne, self.argTwo[0], self.argThree)
|
|
assert_equal(out.shape, self.tgtShape)
|